Human heart diagram easy

In this Higher Human Biology revision guide, you will learn in detail that cardiac output is a measure of the rate of blood flow through the heart and its associated blood vessels. You can also revise the blood vessels leading into and out of the heart, the cardiac conduction system, and autonomic and hormonal control. The structure of the heart If you clench your hand into a fist, this is approximately the same size as your heart. It is located in the middle of the chest and slightly towards the left. The heart is a large muscular pump and is divided into two halves - the right-hand side and the left-hand side . The right-hand side of the heart is responsible for pumping deoxygenated blood to the lungs. The left-hand side pumps oxygenated blood around the body. Each side of the heart consists of an atrium and a ventricle which are two connected chambers. The atria (plural of atrium) are where the blood collects when it enters the heart. The ventricles pump the blood out of the heart to the lungs or around the body. The septum separates the right-hand and left-hand side of the heart. The tricuspid valve is located between the right atrium and right ventricle and opens due to a build-up of pressure in the right atrium. The bicuspid valve is located between the left atrium and left ventricle and likewise opens due to a build-up of pressure, this time in the left atrium. The semilunar valves stop the back flow of blood into the heart. There is a semilunar valve where the aort...

A Labeled Diagram of the Human Heart You Really Need to See The heart, one of the most significant organs in the human body, is nothing but a muscular pump which pumps blood throughout the body. The human heart and its functions are truly fascinating. The heart, though small in size, performs highly significant functions that sustains human life. The human heart resembles the shape of an upside-down pear, weighing between 7-15 ounces, and is little larger than the size of the fist. It is enclosed in a bag-like structure called the pericardium, and is located between the lungs, that is in the middle of the chest, behind and slightly to the left of the sternum or breast bone. It beats approximately 72 times per minute, and pumps oxygenated blood to different parts of the body. The pumped blood also removes waste products from the body. Observing a diagram of the heart, as the one here, will help comprehend the different parts of the human heart. The right atria receives deoxygenated blood from the venae cavae (superior and inferior) and from the heart muscle (coronary sinus). It pumps the blood it receives into the right ventricle. Since it only pumps blood into the next chamber of the heart (right ventricle), its walls are not too thick. Ventricles have thicker walls than the atria, because they need to pump blood to the body. The right ventricle pumps deoxygenated blood, which it receives from the right atria, into the pulmonary artery, which takes it to the lungs. The lef...

Hey there Greg. This is a good question and in short the answer is no. The Tricuspid valves (also called the atrioventricular valves) have a three flap design. Imagine three flaps of tissue that come together to form a seal so that there is no back flow of blood. Since they have three flaps of skin, they are called TRIcuspid (easy to remember). The other valves, the Pulmonary and Aortic valves are semi-lunar valves. These two valves are called this because they have two flaps of skin that can only open in one direction, again to prevent backflow. To help envision this, imagine that you have a hinged door on the wall. With the turn of a knob, you are able to open that door and walk in. However, you are not able to open the door in the opposite direction because the hinge will not allow the door to swing that way. This is the same principle as the semi-lunar valves. They have fibrous "strings" attached to the back so they can only open in one way. The way these valves open is because the blood is literally being forced out of the Ventricle, and this is the main reason why they are different in structure. So when the blood initially flows into the heart, it needs to be stopped in the Atrium and the Ventricle before being pushed out of the heart. This means that there needs to be a reliable barrier between the Atrium and Ventricle which is why there are three flaps. The other valves are meant to be more easily opened so that blood can easily be pushed out of the heart. I hope ...

The normal heart is a strong, hard-working pump made of muscle tissue. It's about the size of a person's fist. The heart has four chambers. The upper two chambers are the atria, and the lower two are the ventricles (Figure A). The chambers are separated by a wall of tissue called the septum. Blood is pumped through the chambers, aided by four heart valves. The valves open and close to let the blood flow in only one direction. Congenital defects may involve a valve, a chamber, the septum, an artery or blood flow issues. The four heart valves are: • the tricuspid valve, located between the right atrium and the right ventricle; • the pulmonary valve, between the right ventricle and the pulmonary artery; • the mitral valve, between the left atrium and left ventricle; and • the aortic valve, between the left ventricle and the Each valve has a set of "flaps" (also called leaflets or cusps). The mitral valve normally has two flaps; the others have three. Healthy heart blood flow patterns The normal blood flow is a cycle that flows like this; body-heart-lungs-heart-body. Next we will look at each step. From the body to the heart. Figure B below shows dark bluish blood, low in oxygen, flowing back to the heart after circulating through the body. It returns to the heart through veins and enters the right atrium. This chamber empties blood through the tricuspid valve (B) into the right ventricle. From the heart to the lungs The right ventricle pumps the blood under low pressure throu...